package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Set;

/**
 * @author 朝花不迟暮
 * @version 1.0
 * @date 2020/12/25 21:28
 */
@Component
public class SpringSecurityUserService implements UserDetailsService
{
    @Reference
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException
    {
        User user = userService.findByUsername(username);
        if (Objects.isNull(user))
        {
            //用户不存在
            return null;
        }
        List<GrantedAuthority> list = new ArrayList<>();
        Set<Role> roles = user.getRoles();
        for (Role role : roles)
        {
            //授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions)
            {
                //授予权限
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        // 密码已经加密过，直接返回
        return new org.springframework.security.core.userdetails.User(username, user.getPassword(), list);
    }
}
